<template>
  <div class="login_container">
    <el-row>
      <el-col :span="12" :xs="0"></el-col>
      <el-col :span="12" :xs="24">
        <el-form
          class="login_form"
          ref="loginFormRef"
          :model="loginForm"
          :rules="rules"
        >
          <h1>Hello</h1>
          <h2>欢迎来到硅谷甄选</h2>
          <el-form-item prop="username">
            <el-input
              :prefix-icon="User"
              v-model="loginForm.username"
            ></el-input>
          </el-form-item>
          <el-form-item prop="password">
            <el-input
              type="password"
              :prefix-icon="Lock"
              v-model="loginForm.password"
              show-password
            ></el-input>
          </el-form-item>
          <el-form-item>
            <el-button
              class="login_btn"
              type="primary"
              size="default"
              @click="login"
              >登录</el-button
            >
          </el-form-item>
        </el-form>
      </el-col>
    </el-row>
  </div>
</template>
  
<script setup lang="ts">
import { User, Lock } from "@element-plus/icons-vue";
import { reactive, ref } from "vue";
// 引入路由
import { useRouter, useRoute } from "vue-router";
const $router = useRouter();
const $route = useRoute();

// 引入提示信息
import { ElNotification } from "element-plus";
// 引入用户相关的小仓库
import useUserStore from "@/store/modules/user";
let useStore = useUserStore();
// 导入时间函数
import { getTime } from "@/utils/time";

// 定义加载
const loading = ref(false);

const loginForm = reactive({
  username: "admin",
  password: "111111",
});

// 自定义校验规则
const validatorUserName = (rule: any, value: any, callback: any) => {
  console.log(rule);
  if (value.length >= 5 && value.length < 10) {
    callback();
  } else {
    callback(new Error("用户名长度必须在5-10位"));
  }
};

const validatorPassword = (rule: any, value: any, callback: any) => {
  console.log(rule);
  if (value.length >= 6 && value.length < 10) {
    callback();
  } else {
    callback(new Error("密码长度必须在6-10位"));
  }
};

// 定义规则
const rules = {
  username: [
    //规则对象属性:
    /* {
      required: true, // required,代表这个字段务必要校验的
      min: 5, //min:文本长度至少多少位
      max: 10, // max:文本长度最多多少位
      message: '长度应为6-10位', // message:错误的提示信息
      trigger: 'change', //trigger:触发校验表单的时机 change->文本发生变化触发校验, blur:失去焦点的时候触发校验规则
    }, */
    { trigger: "change", validator: validatorUserName },
  ],
  password: [{ trigger: "change", validator: validatorPassword }],
};

// 获取表单元素
let loginFormRef = ref();

// 登录
const login = async () => {
  // await只会返回成功，如果不成功 就不往下面执行
  await loginFormRef.value.validate();

  loading.value = true;
  try {
    await useStore.userLogin(loginForm);
    //编程式导航跳转到展示数据的首页
    const redirect: any = $route.query.redirect;
    $router.push({ path: redirect || "/" });
    //登录成功的提示信息
    ElNotification({
      type: "success",
      message: "登录成功！",
      title: `HI ${getTime()}`,
    });
    //登录成功,加载效果也消失
    loading.value = false;
  } catch (error) {
    //登陆失败加载效果消失
    loading.value = false;
    //登录失败的提示信息
    ElNotification({
      type: "error",
      message: (error as Error).message,
    });
  }
};
</script>
  
<style lang="scss" scoped>
.login_container {
  width: 100%;
  height: 100vh;
  background: url("@/assets/images/background.jpg") no-repeat;
  background-size: cover;

  .login_form {
    position: relative;
    width: 80%;
    top: 30vh;
    background: url("@/assets/images/login_form.png") no-repeat;
    background-size: cover;
    padding: 40px;

    h1 {
      color: white;
      font-size: 40px;
    }

    h2 {
      font-size: 20px;
      color: white;
      margin: 20px 0px;
    }

    .login_btn {
      width: 100%;
    }
  }
}
</style>